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   1 ifeq ($(filter no-error,$(DEVOPTS)),)
   2 CFLAGS += -Werror
   3 endif
   4 CFLAGS += -Wdeclaration-after-statement
   5 CFLAGS += -Wno-format-zero-length
   6 CFLAGS += -Wold-style-definition
   7 CFLAGS += -Woverflow
   8 CFLAGS += -Wpointer-arith
   9 CFLAGS += -Wstrict-prototypes
  10 CFLAGS += -Wunused
  11 CFLAGS += -Wvla
  12
  13 ifndef COMPILER_FEATURES
  14 COMPILER_FEATURES := $(shell ./detect-compiler $(CC))
  15 endif
  16
  17 ifneq ($(filter clang4,$(COMPILER_FEATURES)),)
  18 CFLAGS += -Wtautological-constant-out-of-range-compare
  19 endif
  20
  21 ifneq ($(or $(filter gcc6,$(COMPILER_FEATURES)),$(filter clang4,$(COMPILER_FEATURES))),)
  22 CFLAGS += -Wextra
  23 # if a function is public, there should be a prototype and the right
  24 # header file should be included. If not, it should be static.
  25 CFLAGS += -Wmissing-prototypes
  26 ifeq ($(filter extra-all,$(DEVOPTS)),)
  27 # These are disabled because we have these all over the place.
  28 CFLAGS += -Wno-empty-body
  29 CFLAGS += -Wno-missing-field-initializers
  30 CFLAGS += -Wno-sign-compare
  31 CFLAGS += -Wno-unused-function
  32 CFLAGS += -Wno-unused-parameter
  33 endif
  34 endif
  35
  36 # uninitialized warnings on gcc 4.9.2 in xdiff/xdiffi.c and config.c
  37 # not worth fixing since newer compilers correctly stop complaining
  38 ifneq ($(filter gcc4,$(COMPILER_FEATURES)),)
  39 ifeq ($(filter gcc5,$(COMPILER_FEATURES)),)
  40 CFLAGS += -Wno-uninitialized
  41 endif
  42 endif